On 12/24/25 17:47, Viktor Dukhovni via Postfix-users wrote:
..
but if a vendor does ship "btree" or "hash" drivers for Postfix, they
really should change the defaults.

I assume here Viktor meant "does NOT ship".

The prob is that with so long history of btree/hash, it isn't easy
to switch away from it.  Changing defaults is trivial, but it isn't
clear which new default to choose (perhaps lmdb), and the main prob
is to convert existing maps from hash/btree to the new default during
upgrades.

We had an unpleasant experience when BDB changed the format in an
incompatible way, so all maps had to be rebuilt.  Without changing
the config it was easier, but it already was difficult for the users,
despite some attempts to automate it.

Now not only the maps has to be rebuilt, but also the config(s)
has to be changed.


I'm not yet sure how it would be done.  And even which new default to
choose.

Thanks,

/mjt
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